Type-sbttg-casting hechanish



T. W. IOHNS..

TYPE SLUG CASTING NIECHANISM APPLICATION FILED IuLY 23,19Is.

1,318,877?. Patented 001. 14,1919.

THOMAS W. JOHNS, 0F FLORAL PARK, NEW YORK.

TYPE-SLUG-CASTING ll'ECHANISM.

Specification of Letters Patent.

Patented oct. 14, 1919.

Application led July 23, 1918. Serial No. 246,313.

To all whom z't may concern Be it known that I, THOMAS W. JOHNS, a

citizen of the United States, formerly residing at Brooklyn, in the county/.of Kings and State of New York, but now residing at Floral Park, in the county of Nassau and State of New York, have invented new and useful Improvements in Type-Slug-Casting Mechanism, of which the following is a specification. This invention relates to improvements in type-casing machines and more especially to those of the linotype class which cast slugs bearing type characters on an edge thereof.

In machines as heretofore constructed, the mechanism for casting the'type slugs comprised a metal pot or crucible containing the molten type metal, the crucible containing a cylinder which communicated 4with a spout through which the type` metal was introduced into the mold and a plunger recipro` cable in the cylinder to force the type metal therefrom through the spout and into the mold to cast the slug therein. However, it has been found from experience that the return stroke of the plunger, while thc spout of the metal pot is still in engagement with the mold, causes the type metal to be drawn -back from the cast slug into-the throat of the metal pot, this being particularly the case in the casting of relatively large slugs,

. in consequence of which the cast slug is hollow on its bottom o r base.

The primary object of the p'r'esent invention is to provide novel and improved means whereby drawing of the type metal from the slug back into the throat of the metal-pot is avoided, with the result that the slug will contain the full amount of metal and will be solid, the means provided by the present invention for accomplishing thiseresult being relativly simple and inexpensive in its construction and positive and certain in its action, and, furthermore, it is readily applicable to metal pots or crucibles such as those commonly used upon slug or type-casting machines.

In the accompanying drawing:

Figure 1 represents a vertical section taken centrally through a metal pot or crucible and the cooperative mold wheel and mold, the metal pot or crucible embodying the present invention.

Fig. 2 is a view, partly in section and partly in elevation, showing in detail the construction of the metal pot plunger, the parts being shown in the relative positions they occupy during the descent or metalinjecting stroke of the plunger, and

Fig. 3 represents a central vertical section through the plunger showing the parts thereof in the relative positions they occupy during the ascent or return stroke of the plunger.

Similar parts are designated by the same reference characters in the several views.

The present invention is applicable generally to slug or type-casting maclines of the types wherein the type metal is forced or injected into the slug or type mold by areciprocatory plunger. The preferred embodiment of the invention is shown in the present instance as applied to a metal pot upon machines of the linotype class, this mold wheel containing one or more -slotted molds 2, the mold when inuse beingadapted to receive a line of matrices 3 at-its forward side in a manner well understood by those familiar with machines `of this class. The metal pot or Crucible 4 comprises a metal well 5, a cylinder 6, usually arranged vertically within the well', a throat` 7 which leads from the bottom ofthe cylinder upwardly and forwardly into a mouth-piece 8, the latter having orifices through which the type metal passes from the throat and into the cavity of the mold, the forward face of the mouth-pielce being flat and adapted to lit closely against the rear vface of the mold. In machinesof the linotype class, the metall pot is movable forwardly or rearwardly; that is Ato say, toward and from the mold disk, the metal pot moving saV forward to bring the mouth-piece 8 thereon against the rear face of the mold preparatory ,to the injiection of the type metal into the mold, and after the slughas been cast in the niold the metal pot recedes, separat ing the' mouth-piece 8 from the mold. In-

l jection ofv metal into the mold is effected by a plunger 9 which reciprocates in the cylinder 6, reciprocation of the plunger being usually effected by a cam-controlled link or viva:

inf. as v innnm' wincii wi invention is thin" Fen,-

iczition .vi-ii famili,

(L innifi niezmf; im' iacii'nitting such mami in the forwfii side of the piunger, means for actuating 'the niung'ei en its Woi'king :mii reiznrn sinfoPfes, and means controiied mechanicziiiy by Saki actuating means for prveniing' tine Creation of n Vacuum in Said spoilt incident. in the return stroke of iie pinng'er.

li in iii` tinl son?, i3 .nn-rounding iiw mi' ihn pfn'i ni' pn giu ii.

in tins nnominn me a inetbi pot anima-{3fing; ininosvni in'vanion, Hic initini *fini of inivon info vngngg'mncen'- with sin-mnmiing i-iin port 0i passa aiming ifnin port en' passage in (im donc-vnr nf the pinngm, Cnnizincii dosn of iiiv ziciimting iini; or ninnibei i() Camus i'iw ineini in iii@ C i'iin-:iei bznoui'ii the.

w smitv ii, finir; cinninmiigfv mid spontnnii info a, mold, means fol adiniti'ing Vsncii natal to the pressinelsicie of tim pinngfor wiiie the intim* iS retracted, nc- 'i in@` means for @musing eeipmczifion of iie pinngol'` und nnms Operative mechani- 4 E l l h vuiiy in' anni :nizt'nntingg' means for prevent- !)imigm' "i ,i'f mlm@ mummy f mi@ (iii/"W15 ing: iii@ creation nf d mcninn in said spout anni iin?` (mmw in tim .1mm nino msnm me return Stmk@ of the pimnge dm @miti/T Gf im mi im i' i; mvni pn? (n: mn 1ibi@x for @Yivogi'iiphimi inwinnen' wmp i :L spout n @yiincier i'nminnnic; {in g vri the spout, v.- pinnger in mili o 'viiniivi' forcing typo inenbi ini@ :i inniii iw, cyiindaif having; :L pn, which i by; tie pinni'vi when hitter is nv! minimi in :winni @ne ai in the pressure Si A ng' means r@- puni Gwinn il) fi gw? und ingang von raie said actuating means for admitting metal to the spout incident to the commencement of the return stroke of the plunger and while the seid port is closed.

A metal pot or Crucible for typogrupliicul machines comprising a spout, e plunger for forcing type metal therethrough into a mold,` said plunger having u vent passage leading` to its pressure t'ace, ineens for udmitting such nietel to the pressure ffice of the plunger While the lut-ter is suhsturdtielbv in its retracted position, actuating means for operating the plunger' on its Working and return strokes, and means operative by said actuating means to close seid passage preparatory7 to the Working stroke and to open seid passage preparatory to the return stroke of the plunger.

6. A metal pot or erucilole for typographical machines comprising e spout, e reciprocable plunger for forcing nieta-l therethrough into mold, seid plunger having a passage extending through its heed Jfrom its rear to its forward side and formed With u vulve seat, means independent of said passug'e und controlled by the plunger for admitting u supply of type metal to the spout only when the plunger is retracted, and a, reeiprocutory actuating member for operating the plunger on its working stroke, seid member huving u lost motion connection with the plunger and also having e portion adapted to engage in and disen- ,g'uge from Suid vulve seat to respectively close and open said passage preparatory to the working und return strokes of the plunger.

In testimony whereof I have hereunto set my hand in pre-sence of two subscribing Witnesses.

THOMAS W. JOHNS. Witnesses DONALD Fonsrnn, WALTER Fnnnnnroiison. 

